Exhibit 4.3


 


[FACE]


 


Number


 


Warrants


 


THIS WARRANT
SHALL BE VOID IF NOT EXERCISED PRIOR TO


 


THE EXPIRATION
OF THE EXERCISE PERIOD PROVIDED FOR


 


IN THE WARRANT
AGREEMENT DESCRIBED BELOW


 


Monocle Acquisition
Corporation


 


Incorporated Under the Laws of the State
of Delaware


 


CUSIP [●]


 


Warrant Certificate


 


This Warrant Certificate certifies that
________________, or registered assigns, is the registered holder of __________ warrant(s) evidenced hereby (the “Warrants”
and each, a “Warrant”) to purchase shares of common stock, $0.0001 par value per share (“Common
Stock”), of Monocle Acquisition Corporation, a Delaware corporation (the “Company”). Each
Warrant entitles the holder, upon exercise during the period set forth in the Warrant Agreement referred to below, to receive from
the Company that number of fully paid and non-assessable shares of Common Stock as set forth below, at the exercise price (the
“Exercise Price”) as determined pursuant to the Warrant Agreement, payable in lawful money (or through
“cashless exercise” as provided for in the Warrant Agreement) of the United States of America upon surrender
of this Warrant Certificate and payment of the Exercise Price at the office or agency of the Warrant Agent referred to below, subject
to the conditions set forth herein and in the Warrant Agreement. Defined terms used in this Warrant Certificate but not defined
herein shall have the meanings given to them in the Warrant Agreement.


 


Each Warrant is initially exercisable for one
fully paid and non-assessable share of Common Stock. No fractional shares of Common Stock will be issued upon exercise of any Warrant.
If, upon the exercise of Warrants, a holder would be entitled to receive a fractional interest in a share of Common Stock, the
Company will, upon exercise, round down to the nearest whole number the number of shares of Common Stock to be issued to the Warrant
holder. The number of shares of Common Stock issuable upon exercise of the Warrants is subject to adjustment upon the occurrence
of certain events set forth in the Warrant Agreement.


 


The initial Exercise Price per share of Common
Stock for any Warrant is equal to $11.50 per share. The Exercise Price is subject to adjustment upon the occurrence of certain
events set forth in the Warrant Agreement.


 


Subject to the conditions set forth in the Warrant
Agreement, the Warrants may be exercised only during the Exercise Period and to the extent not exercised by the end of such Exercise
Period, such Warrants shall become void. The Warrants may be redeemed, subject to certain conditions, as set forth in the Warrant
Agreement.


 


Reference is hereby made to the further provisions
of this Warrant Certificate set forth on the reverse hereof and such further provisions shall for all purposes have the same effect
as though fully set forth at this place.


 


This Warrant Certificate shall not be valid
unless countersigned by the Warrant Agent, as such term is used in the Warrant Agreement.


 


This Warrant Certificate shall be governed by
and construed in accordance with the internal laws of the State of New York.


 




    	 	 	 



     


    

  


	 	Monocle Acquisition Corporation


 


	 	By:	 





	 	Name:
	 	Title:


 


	 	CONTINENTAL STOCK TRANSFER & TRUST COMPANY, as Warrant Agent


 


	 	By:	 





	 	Name:
	 	Title:


 




    	 	 	 



     


    

  


[Form of Warrant Certificate]


 


[Reverse]


 


The Warrants evidenced by this Warrant Certificate
are part of a duly authorized issue of Warrants entitling the holder on exercise to receive __________ shares of Common Stock and
are issued or to be issued pursuant to a Warrant Agreement dated as of ________________, 2018 (the “Warrant Agreement”),
duly executed and delivered by the Company to Continental Stock Transfer & Trust Company, a New York corporation, as warrant
agent (the “Warrant Agent”), which Warrant Agreement is hereby incorporated by reference in and made
a part of this instrument and is hereby referred to for a description of the rights, limitation of rights, obligations, duties
and immunities thereunder of the Warrant Agent, the Company and the holders (the words “holders” or “holder”
meaning the Registered Holders or Registered Holder, respectively) of the Warrants. A copy of the Warrant Agreement may be obtained
by the holder hereof upon written request to the Company. Defined terms used in this Warrant Certificate but not defined herein
shall have the meanings given to them in the Warrant Agreement.


 


Warrants may be exercised at any time during
the Exercise Period set forth in the Warrant Agreement. The holder of Warrants evidenced by this Warrant Certificate may exercise
them by surrendering this Warrant Certificate, with the form of election to purchase set forth hereon properly completed and executed,
together with payment of the Exercise Price as specified in the Warrant Agreement (or through “cashless exercise” as
provided for in the Warrant Agreement) at the principal corporate trust office of the Warrant Agent. In the event that upon any
exercise of Warrants evidenced hereby the number of Warrants exercised shall be less than the total number of Warrants evidenced
hereby, there shall be issued to the holder hereof or his, her or its assignee, a new Warrant Certificate evidencing the number
of Warrants not exercised.


 


Notwithstanding anything else in this Warrant
Certificate or the Warrant Agreement, no Warrant may be exercised unless at the time of exercise (i) a registration statement covering
the shares of Common Stock to be issued upon exercise is effective under the Securities Act and (ii) a prospectus thereunder relating
to the shares of Common Stock is current, except through “cashless exercise” as provided for in the Warrant Agreement.


 


The Warrant Agreement provides that upon the
occurrence of certain events the number of shares of Common Stock issuable upon exercise of the Warrants set forth on the face
hereof may, subject to certain conditions, be adjusted. If, upon exercise of a Warrant, the holder thereof would be entitled to
receive a fractional interest in a share of Common Stock, the Company shall, upon exercise, round down to the nearest whole number
of shares of Common Stock to be issued to the holder of the Warrant.


 


Warrant Certificates, when surrendered at the
principal corporate trust office of the Warrant Agent by the Registered Holder thereof in person or by legal representative or
attorney duly authorized in writing, may be exchanged, in the manner and subject to the limitations provided in the Warrant Agreement,
but without payment of any service charge, for another Warrant Certificate or Warrant Certificates of like tenor evidencing in
the aggregate a like number of Warrants.


 


Upon due presentation for registration of transfer
of this Warrant Certificate at the office of the Warrant Agent a new Warrant Certificate or Warrant Certificates of like tenor
and evidencing in the aggregate a like number of Warrants shall be issued to the transferee(s) in exchange for this Warrant Certificate,
subject to the limitations provided in the Warrant Agreement, without charge except for any tax or other governmental charge imposed
in connection therewith.


 


The Company and the Warrant Agent may deem and
treat the Registered Holder(s) hereof as the absolute owner(s) of this Warrant Certificate (notwithstanding any notation of ownership
or other writing hereon made by anyone), for the purpose of any exercise hereof, of any distribution to the holder(s) hereof, and
for all other purposes, and neither the Company nor the Warrant Agent shall be affected by any notice to the contrary. Neither
the Warrants nor this Warrant Certificate entitles any holder hereof to any rights of a stockholder of the Company.


 




    	 	3	 



     


    

  


Election to Purchase


 


(To Be Executed Upon Exercise of Warrant)


 


The undersigned hereby irrevocably elects to
exercise the right, represented by this Warrant Certificate, to receive ________________ shares of Common Stock and herewith tenders
payment for such shares of Common Stock to the order of Monocle Acquisition Corporation (the “Company”) in the
amount of $__________ in accordance with the terms hereof. The undersigned requests that a certificate for such shares of Common
Stock be registered in the name of ________________, whose address is ________________ and that such shares of Common Stock be
delivered to ________________ whose address is ________________. If said number of shares of Common Stock is less than all of the
shares of Common Stock purchasable hereunder, the undersigned requests that a new Warrant Certificate representing the remaining
balance of such shares of Common Stock be registered in the name of ________________, whose address is ________________ and that
such Warrant Certificate be delivered to ________________, whose address is ________________.


 


In the event that the Warrant has been called
for redemption by the Company pursuant to Section 6.1 or Section 6.2 of the Warrant Agreement and the
Company has required cashless exercise pursuant to Section 6.3 of the Warrant Agreement, the number of shares of Common
Stock that this Warrant is exercisable for shall be determined in accordance with subsection 3.3.1(b) and Section 6.3
of the Warrant Agreement.


 


In the event that the Warrant is a Private Placement
Warrant that is to be exercised on a “cashless” basis pursuant to subsection 3.3.1(c) of the Warrant Agreement,
the number of shares of Common Stock that this Warrant is exercisable for shall be determined in accordance with subsection
3.3.1(c) of the Warrant Agreement.


 


In the event that the Warrant is to be exercised
on a “cashless” basis pursuant to Section 7.4 of the Warrant Agreement, the number of shares of Common Stock
that this Warrant is exercisable for shall be determined in accordance with Section 7.4 of the Warrant Agreement.


 


In the event that the Warrant may be exercised,
to the extent allowed by the Warrant Agreement, through cashless exercise (i) the number of shares of Common Stock that this Warrant
is exercisable for would be determined in accordance with the relevant section of the Warrant Agreement which allows for such cashless
exercise and (ii) the holder hereof shall complete the following: The undersigned hereby irrevocably elects to exercise the right,
represented by this Warrant Certificate, through the cashless exercise provisions of the Warrant Agreement, to receive shares of
Common Stock. If said number of shares is less than all of the shares of Common Stock purchasable hereunder (after giving effect
to the cashless exercise), the undersigned requests that a new Warrant Certificate representing the remaining balance of such shares
of Common Stock be registered in the name of ________________, whose address is ________________ and that such Warrant Certificate
be delivered to ________________, whose address is ________________.


 


[Signature Page Follows]


 




    	 	4	 



     


    

  


	Date:  _________________, 20	 
	 	(Signature)
	 	 
	 	 
	 	 
	 	 
	 	(Address)
	 	 
	 	 
	 	(Tax Identification Number)
	Signature Guaranteed:	 
	 	 


 


THE SIGNATURE(S) MUST BE GUARANTEED BY AN ELIGIBLE
GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE
GUARANTEE MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15 (OR ANY SUCCESSOR RULE) UNDER THE SECURITIES EXCHANGE ACT OF 1934,
AS AMENDED).